Omega Owners Forum - Clutch contamination

v6miggy

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Clutch contamination
25. Apr 2011 at 12:32

What is near the clutch that could cause contamination, resulting in bad juddering when pulling off in 1st or reverse? No other symptoms except the judder and is worse when the car has warmed up.
No excessive oil loss either.
I am trying to get to the bottom of this juddering issue. The prop was changed at the weekend, thinking it could be drivetrain related but no change. Any opinions welcome.

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Bent valve

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Re: Clutch contamination
Reply #1 - 25. Apr 2011 at 16:43

Assuming that you are not having DMF problems, another probable cause strange as it might seem, is failing plug leads.
I have first hand experience of this as I have run a Mercedes 190 for a few years now and it had always suffered from clutch judder which could be controlled if you let the clutch out and fed the revs in 'in the right way'
something that my wife could never master Grin

Anyway, apart from that it ran very smoothly until recently when it developed a misfire then started to run on 3 cylinders. Upon investigation I found that one of the HT leads was arcing out, so I fitted a new set of leads and the car fired up and ran as smoothly as before the misfire set in but with the added benefit that the clutch judder had dissapeared. I can only conclude that the leads were breaking down slowly and that when extra load was put on the system when setting off from rest it was causing the engine to stutter setting off the clutch judder.

So maybe its time for an ignition system overhaul?

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r1 Omega Knight Offline Posts: 1043 nottingham Gender: Drives: 2.5	Re: Clutch contamination Reply #2 - 25. Apr 2011 at 19:39 worn engine mounts will also give clutch judder symptons
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ffcgary1 Omega Baron Offline I really must get my eyes seen to. Posts: 2263 Mitcham,Surrey. Gender: Drives: 2.5 v6 tourer, 2000 4.0 straight 6 jeep cherokee lpg	Re: Clutch contamination Reply #3 - 25. Apr 2011 at 20:14 If you have a contaminated clutch then it could be the rear main seal or coolant leaking from the hbv or oil cooler plate. But............................ Have you thought it just might be worn out and needs changing?
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Andy H Omega Knight Offline Posts: 1833 Cornwall Gender: Drives: 03 2.6 Elite Auto	Re: Clutch contamination Reply #4 - 25. Apr 2011 at 22:01 The clutch slave cylinder and the gearbox input shaft seal are in the right area. Not aware of anyone else having issues with them though.
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v6miggy

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Re: Clutch contamination
Reply #5 - 25. Apr 2011 at 22:04

Reply to all without quote.
Definitely not HT related. It seems to start at the front and then end in hard knocking from the rear. This is why I went down the propshaft route (U/J), no change. I have considered the diff but then thought that it may happen in other gears when the drive is taken up.
HBV only year old and no coolant loss.
JamesV6 had the car before me and says it was a new clutch, so that is about 4 years and 50000 miles old.
It really feels like something at the back is holding on when I pull off in 1st. I may have understated the judder, it is more like a banging of resistance.
Hope this is a bit clearer.

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mrgreen Senior Member Offline Posts: 766 Salzburg/austria Gender: Drives: 2.2 facelift caravan	Re: Clutch contamination Reply #6 - 25. Apr 2011 at 23:29 i would check your gearbox and engine mounts i find a good way to do this is get someone to hold on the handbrake and put a bit of pressure through the back wheels and you'll soon see twisting if they are worn
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v6miggy

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Re: Clutch contamination
Reply #7 - 25. Apr 2011 at 23:47

mrgreen wrote on 25. Apr 2011 at 23:29:

i would check your gearbox and engine mounts i find a good way to do this is get someone to hold on the handbrake and put a bit of pressure through the back wheels and you'll soon see twisting if they are worn

The mounts have been mentioned and I think that will be the cheapest option to check out next Thumbs Up!

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ffcgary1 Omega Baron Offline I really must get my eyes seen to. Posts: 2263 Mitcham,Surrey. Gender: Drives: 2.5 v6 tourer, 2000 4.0 straight 6 jeep cherokee lpg	Re: Clutch contamination Reply #8 - 26. Apr 2011 at 09:59 Check that your handbrake is not binding on, that will make it feel as if something is holding it back.
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mathewst Omega Knight Offline Posts: 1499 Split, Croatia Gender: Drives: omega 2.2i 16v	Re: Clutch contamination Reply #9 - 26. Apr 2011 at 14:54 One thing nobody mentioned. Crappy fuel. Friend of mine had the same symptoms on his 307cc. Whenever he put 95 octane fuel he would get judder when pulling off. Although mig is made for 95 octane fuel try changing the fuel pump station first for some more quality fuel
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v6miggy Senior Member Offline Posts: 890 Gender: Drives: 2000 2.5V6 CDX	Re: Clutch contamination Reply #10 - 28. Apr 2011 at 11:16 ffcgary1 wrote on 26. Apr 2011 at 09:59: Check that your handbrake is not binding on, that will make it feel as if something is holding it back. All rear brakes renewed. Was there before and after.
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v6miggy

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Re: Clutch contamination
Reply #11 - 28. Apr 2011 at 11:17

mathewst wrote on 26. Apr 2011 at 14:54:

One thing nobody mentioned.
Crappy fuel.
Friend of mine had the same symptoms on his 307cc.
Whenever he put 95 octane fuel he would get judder when pulling off.
Although mig is made for 95 octane fuel try changing the fuel pump station first for some more quality fuel

Does it on lpg and petrol so that ruled out. It is a mechanical issue without a doubt.

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Kevin Wood Global Moderator Admin Team Offline Posts: 20377 Alton, Hampshire Gender: Drives: 3.2 MV6 (LPG), Westfield	Re: Clutch contamination Reply #12 - 28. Apr 2011 at 11:39 v6miggy wrote on 28. Apr 2011 at 11:17: Does it on lpg and petrol so that ruled out. It is a mechanical issue without a doubt. If the engine, gearbox and propshaft centre support mounts are sound then I think the gearbox needs to come out for a look at the clutch and dual mass flywheel. Kevin
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